compiler error: unhandled exception: index out of bounds, the container is empty [IndexError]

[stefantalpalaru]

replication instructions

git clone https://github.com/status-im/nimbus-eth2.git
cd nimbus-eth2
git checkout unstable
make -j8 update
# replace with your own Nim build from the "version-1-2" branch
PATH="/src/77_DLD/CODE/00_github/Nim/bin/:${PATH}"; rm -rf nimcache; make -j8 USE_SYSTEM_NIM=1 V=1 all_tests

stack trace

/mnt/sda3/storage/CODE/00_github/Nim/compiler/nim.nim(118) nim
/mnt/sda3/storage/CODE/00_github/Nim/compiler/nim.nim(95) handleCmdLine
/mnt/sda3/storage/CODE/00_github/Nim/compiler/cmdlinehelper.nim(77) loadConfigsAndRunMainCommand
/mnt/sda3/storage/CODE/00_github/Nim/compiler/main.nim(193) mainCommand
/mnt/sda3/storage/CODE/00_github/Nim/compiler/main.nim(95) commandCompileToC
/mnt/sda3/storage/CODE/00_github/Nim/compiler/modules.nim(143) compileProject
/mnt/sda3/storage/CODE/00_github/Nim/compiler/modules.nim(84) compileModule
/mnt/sda3/storage/CODE/00_github/Nim/compiler/passes.nim(216) processModule
/mnt/sda3/storage/CODE/00_github/Nim/compiler/passes.nim(86) processTopLevelStmt
/mnt/sda3/storage/CODE/00_github/Nim/compiler/sem.nim(604) myProcess
/mnt/sda3/storage/CODE/00_github/Nim/compiler/sem.nim(572) semStmtAndGenerateGenerics
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semstmts.nim(2308) semStmt
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(1006) semExprNoType
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(2801) semExpr
/mnt/sda3/storage/CODE/00_github/Nim/compiler/importer.nim(218) evalImport
/mnt/sda3/storage/CODE/00_github/Nim/compiler/importer.nim(188) impMod
/mnt/sda3/storage/CODE/00_github/Nim/compiler/importer.nim(158) myImportModule
/mnt/sda3/storage/CODE/00_github/Nim/compiler/modules.nim(98) importModule
/mnt/sda3/storage/CODE/00_github/Nim/compiler/modules.nim(84) compileModule
/mnt/sda3/storage/CODE/00_github/Nim/compiler/passes.nim(210) processModule
/mnt/sda3/storage/CODE/00_github/Nim/compiler/passes.nim(86) processTopLevelStmt
/mnt/sda3/storage/CODE/00_github/Nim/compiler/sem.nim(604) myProcess
/mnt/sda3/storage/CODE/00_github/Nim/compiler/sem.nim(572) semStmtAndGenerateGenerics
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semstmts.nim(2308) semStmt
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(1006) semExprNoType
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(2768) semExpr
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semstmts.nim(2248) semStmtList
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(2678) semExpr
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(987) semDirectOp
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(836) semOverloadedCallAnalyseEffects
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semcall.nim(566) semOverloadedCall
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semcall.nim(527) semResolvedCall
/mnt/sda3/storage/CODE/00_github/Nim/compiler/seminst.nim(400) generateInstance
/mnt/sda3/storage/CODE/00_github/Nim/compiler/seminst.nim(148) instantiateBody
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(1764) semProcBody
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(2768) semExpr
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semstmts.nim(2248) semStmtList
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semexprs.nim(2791) semExpr
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semtempl.nim(675) semTemplateDef
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semtempl.nim(581) semTemplBody
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semtempl.nim(349) semTemplBodySons
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semtempl.nim(382) semTemplBody
/mnt/sda3/storage/CODE/00_github/Nim/compiler/semtempl.nim(114) semMixinStmt
/mnt/sda3/storage/CODE/00_github/Nim/compiler/lookups.nim(51) considerQuotedIdent
/mnt/sda3/storage/CODE/00_github/Nim/lib/system/fatal.nim(49) sysFatal
Error: unhandled exception: index out of bounds, the container is empty [IndexError]
make: *** [Makefile:232: all_tests] Error 1

$ nim -v
Nim Compiler Version 1.2.11 [Linux: amd64]
Compiled at 2021-04-12
Copyright (c) 2006-2020 by Andreas Rumpf

git hash: fe8b84496ffe40cd86b9db688cf5494187b437e4
active boot switches:

[timotheecour]

please minimize and test against devel (like all other bug reports)

[narimiran]

test against devel

They (Status) use Nim 1.2.x and this was caught as a part of the testing of 1.2.12 RC.

[narimiran]

Fixed by 6238f2e, will be available in the nightlies tomorrow morning.

@stefantalpalaru In the mean time, you can checkout version-1-2 branch and test it. I've tested locally, and for me the command you posted in OP works now.

[timotheecour]

this will probably unblock OP, but before closing this issue, we should still minimize and see whether root problem occurs on devel, because based on 6238f2e it's likely that #17255 would cause the problem on devel.

[stefantalpalaru]

you can checkout version-1-2 branch and test it

Yes, it works now. Thanks!

we should still minimize

Easier said than done.

see whether root problem occurs on devel

I can't compile Nimbus-eth2 programs with Nim devel. First it fails with:

/mnt/sde1/storage/nimbus-eth2/vendor/nim-libp2p/libp2p/protocols/pubsub/gossipsub.nim(297, 38) Error: 't' is of type <lent string> which cannot be captured as it would violate memory safety, declared here: /mnt/sde1/storage/nimbus-eth2/vendor/nim-libp2p/libp2p/protocols/pubsub/gossipsub.nim(290, 11); using '-d:nimWorkaround14447' helps in some cases
then, after adding '-d:nimWorkaround14447', it fails in another way:

/mnt/sde1/storage/nimbus-eth2/beacon_chain/networking/eth2_network.nim(1283, 25) template/generic instantiation from here
/mnt/sde1/storage/nimbus-eth2/beacon_chain/networking/eth2_network.nim(1362, 29) Error: implementSendProcBody sendProc can raise an unlisted exception: Exception